commit 83c147177e643f671c0c1ade3a5b863eae099759
parent 063a2d796f339baab608227d908d0d9f842d3ee9
Author: William Lindholm <william_lindholm@outlook.com>
Date: Wed, 9 Oct 2024 19:47:40 +0100
Added initialization of adc0.
Diffstat:
3 files changed, 57 insertions(+), 87 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -52,4 +52,6 @@ Mkfile.old
dkms.conf
# Debug directory
-**/Debug/*
-\ No newline at end of file
+**/Debug/*
+Project1/.vs/Project1/v14/.atsuo
+Project1/.vs/Project1/v14/.atsuo
diff --git a/Project1/.vs/Project1/v14/.atsuo b/Project1/.vs/Project1/v14/.atsuo
Binary files differ.
diff --git a/Project1/Project1/main.c b/Project1/Project1/main.c
@@ -5,8 +5,6 @@
* Authors: William Lindholm, Thomas Berry
*/
-#define BINARY_SETTINGS 1
-
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/cpufunc.h>
@@ -23,100 +21,80 @@ struct LED_BITS LED_Array[10] = {
{&PORTC, PIN5_bm}, {&PORTC, PIN4_bm}, {&PORTA, PIN0_bm}, {&PORTF, PIN5_bm}, {&PORTC, PIN6_bm}, {&PORTB, PIN2_bm}, {&PORTF, PIN4_bm}, {&PORTA, PIN1_bm}, {&PORTA, PIN2_bm}, {&PORTA, PIN3_bm}
};
-void CLOCK_init (void);
-void InitialiseLED_PORT_bits(void);
-void Set_Clear_Ports(uint8_t set);
-void TCA0_init_bits(void);
+void clock_init (void);
+void set_leds_output(void);
+void set_clr_leds(bool set);
+void configure_TCA0(void);
+void configure_ADC0(void);
+int main(void)
+{
+ clock_init();
+ set_leds_output();
+ set_clr_leds(0); // ensure all leds are turned off by default
+ configure_TCA0();
+ configure_ADC0();
+
+ sei(); // Global interrupts enable
+
+ for (;;){}
+}
-void CLOCK_init (void)
+/* Set the CPU frequency to 20Mhz, default 6Mhz */
+void clock_init (void)
{
- /* Disable CLK_PER Prescaler */
+ // Disable CLK_PER Prescaler
ccp_write_io( (void *) &CLKCTRL.MCLKCTRLB , (0 << CLKCTRL_PEN_bp));
- /* If set from the fuses during device programming, the CPU will now run at 20MHz (default is /6) */
}
-void InitialiseLED_PORT_bits()
+/* Set all led pins to output mode */
+void set_leds_output()
{
- PORTC.DIR = PIN6_bm | PIN5_bm | PIN4_bm; /*(1<<6) | (1<<5) | (1<<4); 0x70;*/ /* PC4-UNO D1 (TXD1), PC5-UNO D0 (RXD1), PC6 - UNO D4 */
- PORTA.DIR = PIN3_bm | PIN2_bm | PIN1_bm | PIN0_bm; /*(1<<1) | (1<<0); 0x0f; */ /* PA1-UNO D7, PA0 - UNO D2, PA2- LED8, PA3 - LED9 */
- PORTB.DIR = PIN2_bm; /*0x04;*/ /* PB2 - UNO D5 */
- PORTF.DIR = PIN5_bm | PIN4_bm; /*(1<<5) | (1<<4); 0x30; */ /* PF5 - UNO D3, PF4 UNO D6 */
- /* Later use PIN6_bm etc */
+ PORTC.DIR = PIN6_bm | PIN5_bm | PIN4_bm;
+ PORTA.DIR = PIN3_bm | PIN2_bm | PIN1_bm | PIN0_bm;
+ PORTB.DIR = PIN2_bm;
+ PORTF.DIR = PIN5_bm | PIN4_bm;
}
-/* Function to set or clear all LED port bits, 1 - set, 0 - clear */
-void Set_Clear_Ports(uint8_t set) {
-
- uint8_t i;
+/* Enable and configure TCA0 */
+void configure_TCA0(void)
+{
+ TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm; //Counter overflow interrupt option
+ TCA0.SINGLE.CTRLB = 0x00; // Normal Mode selected - TOP value in PER register
+ TCA0.SINGLE.EVCTRL = 0x00; // TCA0 can count events from the EVENT module - disable this option
- for (i = 0; i <= 9; i += 1)
- {
- if (set)
- LED_Array[i].LED_PORT->OUTSET = LED_Array[i].bit_mapping;
- else
- LED_Array[i].LED_PORT->OUTCLR = LED_Array[i].bit_mapping;
- }
+ TCA0.SINGLE.PER = 9766; // The TCA0 counter will overflow when it reaches the PER value
+ TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1024_gc | TCA_SINGLE_ENABLE_bm; // Prescale set to /1024 and enable TCA0 (start count)
}
-void Toggle_Ports(void)
+/* Enable and configure ADC0 */
+void configure_ADC0()
{
- uint8_t i;
-
- for (i = 0; i <= 9; i += 1)
- {
- LED_Array[i].LED_PORT->OUTTGL = LED_Array[i].bit_mapping;
- }
+ ADC0.CTRLA = ADC_RESSEL_8BIT_gc | ADC_FREERUN_bm; // Set 8 bit resolution and freerun mode
+ ADC0.CTRLC = VREF_AC0REFSEL_AVDD_gc | ADC_PRESC_DIV128_gc; // Set reference voltage to 5V and set ADC prescaler to div 128
+ ADC0.MUXPOS = ADC_MUXPOS_AIN3_gc; // set input to Analog in 3
+ ADC0.CTRLA |= ADC_ENABLE_bm; // Enable ADC
}
-int main(void)
-{
- CLOCK_init();
+/* Set or clear all LED port bits, 1 - set, 0 - clear */
+void set_clr_leds(bool set) {
- /* set UNO D0-D7 to all outputs, also LED8 and LED9 */
- InitialiseLED_PORT_bits();
-
- Set_Clear_Ports(0);
-
- TCA0_init_bits();
-
- sei();
-
- while (1)
+ uint8_t i;
+ for (i = 0; i <= 9; i += 1)
{
+ if (set)
+ {
+ LED_Array[i].LED_PORT->OUTSET = LED_Array[i].bit_mapping;
+ }
+ else
+ {
+ LED_Array[i].LED_PORT->OUTCLR = LED_Array[i].bit_mapping;
+ }
}
}
-void TCA0_init_bits(void)
-{
-
- #ifdef BINARY_SETTINGS
-
- TCA0.SINGLE.INTCTRL = 0b00000001; /* Counter overflow interrupt option */
- TCA0.SINGLE.CTRLB = 0b00000000; /* Normal Mode selected - TOP value in PER register */
- TCA0.SINGLE.EVCTRL = 0b00000000; /* TCA0 can count events from the EVENT module - disable this option */
-
- /* Now set the PER register to 9766, our top value */
- /* This is because 20MHz/1024 gives TCA0clk period = 51.2us and 51.2us*9766 = 0.5000192s */
-
- TCA0.SINGLE.PER = 9766; /* The TCA0 counter will overflow when it reaches the PER value */
- TCA0.SINGLE.CTRLA = 0b00001111; /* Prescale set to /1024 and enable TCA0 (start count) */
-
- #else
-
- /* Same implementation using explicit bit naming: */
- TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm; //Counter overflow interrupt option
- TCA0.SINGLE.CTRLB = 0x00; // Normal Mode selected - TOP value in PER register
- TCA0.SINGLE.EVCTRL = 0x00; // TCA0 can count events from the EVENT module - disable this option
-
-
- TCA0.SINGLE.PER = 9766; // The TCA0 counter will overflow when it reaches the PER value
- TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1024_gc | TCA_SINGLE_ENABLE_bm; // Prescale set to /1024 and enable TCA0 (start count)
-
- #endif
-
-}
+/* Interrupt for cylon animation */
ISR(TCA0_OVF_vect)
{
static uint8_t i = 0; // Index of the current LED
@@ -136,17 +114,8 @@ ISR(TCA0_OVF_vect)
}
if (i >= 9 || i <= 0) {
- direction = !direction;
+ direction = !direction; // reverse direction
}
- //Toggle_Ports();
- /* The interrupt flag has to be cleared manually */
-
- #ifdef BINARY_SETTINGS
- TCA0.SINGLE.INTFLAGS = 0b00000001; /* Writing 1 to the flag bit clears it */
- #else
- /* Same implementation using explicit bit naming: */
TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm;
- #endif
-
}
\ No newline at end of file
